An analysis of punching shear in reinforced concrete flat slabs and the implementation of steel fibres to increase shear resistance

Tear, James (2014) An analysis of punching shear in reinforced concrete flat slabs and the implementation of steel fibres to increase shear resistance. MEng dissertation, University of Portsmouth.

[img] PDF
Restricted to Registered users only

Download (4MB)

    Abstract

    This paper analytically investigates the behaviour and capacity of steel fibre reinforced concrete (SFRC) and reinforced concrete (RC) flat slabs modelled under punching shear force, alongside the accuracy of Eurocode 2 (EC2) design guidelines. A total of nine smallscale flat slabs with varied thicknesses that consisted of six SFRC and three control RC models were separated into three size groups and analysed using finite element (FEA)computer software. The effect that steel fibres have on the equivalent stress, shear stress and displacement of the slabs is recorded and discussed. The results of the RC control samples show EC2 provides a satisfactory if not conservative estimation of punching shear resistance of RC slabs without shear reinforcement. On average the EC2 estimations were 24% lower than the actual resistance of the RC slabs as modelled. With the introduction of fibres into the model, a reduction in equivalent stress, shear stress and displacement of slabs was noted as well as a reduction of cracking. When comparing the results from the RC and the SFRC models, a significant reduction of 8‐11 Mpa in equivalent stress was noted at the same load factors between the two material composites. The results of the SFRC – RC comparison suggest that an increase in punching shear resistance is seen when steel fibres are added to the concrete mix.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 06 Feb 2015 10:37
    Last Modified: 06 Feb 2015 10:37
    URI: http://eprints.port.ac.uk/id/eprint/16726

    Actions (login required)

    View Item

    Document Downloads

    More statistics for this item...